德國Rexroth力士樂齒輪泵結構簡介
Rexroth Rexroth solenoid valves, proportional valves, valve, piston pumps, gear pumps, fuel pumps, we often make a great product, our company registered since 2006, already has nea

德國Rexroth力士樂齒輪泵結構簡介
Rexroth Rexroth solenoid valves, proportional valves, valve, piston pumps, gear pumps, fuel pumps, we often make a great product, our company registered since 2006, already has nearly 10 years of sales experience, we rent area 20 square meters to 126 square meters, the size of the company continued to expand, with the witness of time, so we have more and more responsible for the quality of service staff, welcomed the new and old customers to view.
Granville West industrial products, instruments and spare parts suppliers
Our advantage:
1) wide channels, the domestic agent or a customer to protect the manufacturers do not sell products, as long as you can provide a model, we can also be purchased from the German distributor.
2) reasonable price, bypassing the layers of agents, to maximize the profit to customers.
3) direct procurement from the German manufacturer, to ensure that all products are original authentic.

德國Rexroth力士樂齒輪泵結構簡介

1-泵體(Housing);2.主動齒輪(Driver Gear);3-從動齒輪(Driven Gear)
泵體內相互嚙合的主、從動齒輪2和3與兩端蓋及泵體一起構成密封工作容積，齒輪的嚙合點將左、右兩腔隔開，形成了吸、壓油腔，當齒輪按圖示方向旋轉時，右側吸油腔內的輪齒脫離嚙合，密封工作腔容積不斷增大，形成部分真空，油液在大氣壓力作用下從油箱經吸油管進入吸油腔，并被旋轉的輪齒帶入左側的壓油腔。左側壓油腔內的輪齒不斷進入嚙合，使密封工作腔容積減小，油液受到擠壓被排往系統(tǒng)，這就是齒輪泵的吸油和壓油過程。在齒輪泵的嚙合過程中，嚙合點沿嚙合線，把吸油區(qū)和壓油區(qū)分開。
Rexroth齒輪泵均采用修正漸開線齒形，用活動月牙板將高、低壓腔分開，并在徑向形成壓力補償，使得內外齒齒頂與月牙板之間形成幾無間隙的密封，軸向動補償盤則保證軸向間隙的良好密封，使得該泵的內泄漏減至zui低。低壓12Mpa、中壓21Mpa、高壓33 Mpa。此結構容積效率高、結構復雜，制造成本高。他適用于輸送各種輕質、揮發(fā)性液體，直至重質、粘稠液體，甚至半固態(tài)液體。廣泛應用于石油、化工、油脂、涂料等行業(yè)。目前有泊頭市宏譽泵閥有限公司加工生產。Rexroth力士樂齒輪泵REXROTH齒輪泵是采用齒輪內嚙合原理，Rexroth內外齒輪節(jié)圓緊靠一邊，另一邊被泵蓋上“月牙板”隔開。主軸上的主動內齒帶動外齒輪同向轉動，在進口處輪齒相互分離形成負壓而吸入液體，輪齒在出口處不斷嵌入嚙合而將液體擠壓輸出。由于這種*的結構，所以特別適用于輸送粘度大的介質，粘度范圍為0.2-100000cp。本系列泵可反向輸送，只要更換電機轉向即可。該泵泵體可轉向，進出口位置成直角，便于選配進出口位置； NCB-BW泵在泵體、端蓋、軸承座間都有連接方便的保溫或冷卻介質的進出接口。連接形式有喬式、直連式；材質有碳鋼、不銹鋼；密封形式有填料密封、機械密封；所配電機有普通電機、防爆電機。該泵特點：無困料現(xiàn)象、輸出平穩(wěn)、效率高、噪音小、使用壽命長優(yōu)點。
力士樂齒輪泵的困油現(xiàn)象及消除措施
徑向不平衡力 Radial Unbalance Force
在Rexroth齒輪泵中，油液作用在輪外緣的壓力是不均勻的，從低壓腔到高壓腔，壓力沿齒輪旋轉的方向逐齒遞增，因此，齒輪和軸受到徑向不平衡力的作用，工作壓力越高，徑向不平衡力越大，徑向不平衡力很大時，能使泵軸彎曲，導致齒頂壓向定子的低壓端，使定子偏磨，同時也加速軸承的磨損，降低軸承使用壽命。為了減小徑向不平衡力的影響，常采取縮小壓油口的辦法，使壓油腔的壓力僅作用在一個齒到兩個齒的范圍內，同時，適當增大徑向間隙，使齒頂不與定子內表面產生金屬接觸，并在支撐上多采用滾針軸承或滑動軸承。
Rexroth齒輪泵的泄漏通道及端面間隙的自動補償Leakage Passage and Automatic Compensating of End Face Clearance
在液壓泵中，運動件間的密封是靠微小間隙密封的，這些微小間隙從運動學上形成摩擦副，同時，高壓腔的油液通過間隙向低壓腔的泄漏是不可避免的；齒輪泵壓油腔的壓力油可通過三條途經泄漏到吸油腔去：一是通過齒輪嚙合線處的間隙——齒側間隙(Meshing-Teeth Side Clearance)，二是通過泵體定子環(huán)內孔和齒頂間的徑向間隙——齒頂間隙(teeth Tip clearance)，三是通過齒輪兩端面和側板間的間隙——端面間隙(Side Plates-end Face Clearance)。在這三類間隙中，端面間隙的泄漏量zui大，壓力越高，由間隙泄漏的液壓油就愈多。因此，為了提高齒輪泵的壓力和容積效率，實現(xiàn)齒輪泵的高壓化，需要從結構上來取措施，對端面間隙進行自動補償。
通常采用的自動補償端面間隙裝置有：浮動軸套式(Floating Bush Bearing)或彈性側板式(Elastic Side Plate)兩種。，其原理都是引入壓力油使軸套或側板緊貼在齒輪端面上，壓力愈高，間隙愈小，可自動補償端面磨損和減小間隙。齒輪泵的浮動軸套是浮動安裝的，軸套外側的空腔與泵的壓油腔相通，當泵工作時，浮動軸套受油壓的作用而壓向齒輪端面，將齒輪兩側面壓緊，從而補償了端面間隙。

德國Rexroth力士樂齒輪泵結構簡介

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